"Raw garlic is very strong, so eating too much could produce problems, for example irritation of or even damage to the digestive tract.

There are a few people who are allergic to garlic. Symptoms of garlic allergy include skin rash, temperature and headaches. Also, garlic could potentially disrupt anti-coagulants, so it's best avoided before surgery. As with any medicine, always check with your doctor first and tell your doctor if you are using it."